Attention inhibition of early cortical activation to fearful faces
Attention inhibition of early cortical activation to fearful faces
复制标题
DOI：
10.1016/j.brainres.2009.11.060
复制
发表时间：
2010-02-08
期刊：
影响因子：
2.9
通讯作者：
Taylor, Margot J.
中科院分区：
文献类型：
--
作者：
Bayle, Dimitri J.;Taylor, Margot J.
多项证据表明，面部表情处理可以在面部呈现后的前 130 毫秒内发生，但目前尚不清楚这是如何通过注意力进行调节的。我们向关注重复身份或重复情绪的受试者呈现中性、恐惧和快乐的面孔。使用脑磁图（MEG）记录大脑活动，并通过与事件相关的波束形成进行分析，提供大脑处理的时间和空间信息。第一个 MEG 分量位于 90 毫秒 (M90)，对面部表情敏感，但仅当注意力不集中在表情上时；无人关注的恐惧面孔会增加枕叶和右额中回的激活。在 150 毫秒左右，无论注意力方向如何，与中性面孔相比，多个大脑区域的情绪活动都更大；对面部表情的关注会增加双侧右侧梭状回、脑回和前岛叶的活动。 M220 不受个体面部表情的调节；然而，对面部表情的注意力增强了右顶下叶和楔前叶的活动，而对身份的注意力则增强了后扣带回的活动。这些数据表明，面部表情处理早在 90 毫秒就涉及到额脑区域。对情绪表达的关注掩盖了这种早期的自动处理，但增加了 M170 的活动。 M220 的来源随关注方向的不同而变化。因此，面孔的神经激活模式随着对情绪或身份的关注而变化，这表明面孔中包含的这两个方面的信息存在独立且仅部分重叠的网络。 (c) 2009 Elsevier B.V. 保留所有权利。
Several lines of evidence demonstrate that processing facial expression can occur in the first 130 ms following a face presentation, but it remains unclear how this is modulated by attention. We presented neutral, fearful and happy faces to subjects who attended either to repeated identity or to repeated emotions. Brain activity was recorded using magnetoencephalography (MEG) and analyzed with event-related beamforming, providing both temporal and spatial information of processing in the brain. The first MEG component, at 90 ms (M90), was sensitive to facial expression, but only when attention was not directed to expression; non-attended fearful faces increased activation in occipital and right middle frontal gyri. Around 150 ms, activity in several brain regions, regardless of the direction of attention, was larger to emotional compared to neutral faces; attention directed to facial expressions increased activity in the right fusiform, gyrus and the anterior insula bilaterally. M220 was not modulated by individual facial expressions; however, attention directed to facial expressions enhanced activity in the right inferior parietal lobe and precuneus, while attention directed to identity enhanced posterior cingulate activity. These data demonstrate that facial expression processing involves frontal brain areas as early as 90 ms. Attention directed to emotional expressions obscured this early automatic processing but increased the M170 activity. The M220 sources varied with the direction of attention. Thus, the pattern of neural activation to faces varied with attention to emotions or to identity, demonstrating separate and only partially overlapping networks for these two facets of information contained in faces. (c) 2009 Elsevier B.V. All rights reserved.